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ZOB instructor controller experienced operational error at FL250 during busy traffic when student issued wrong altitude and read back of assigned altitude was missed.
| Attributes | |
| ACN | 789210 |
| Time | |
| Date | 200805 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ewc.vortac |
| State Reference | PA |
| Altitude | msl single value : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 145 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : instructor |
| Qualification | controller : radar |
| Experience | controller radar : 8 flight time total : 65 |
| ASRS Report | 789210 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar instruction : trainee |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert aircraft equipment : tcas other controllera |
| Resolutory Action | controller : issued new clearance controller : issued alert flight crew : took evasive action |
| Miss Distance | horizontal : 22800 vertical : 600 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was mistakenly assigned FL270 by the radar developmental. Traffic was air carrier Y at FL260. TCAS RA on both aircraft and standard separation was lost. The problem could have been prevented if I or the developmental caught the readback; or realized this situation was developing. 14 estimated aircraft on frequency; numerous aircraft being vectored for instrument approachs at 2 different airports; many VFR aircraft. 2 frequencys being worked caused many overlapping calls and high complexity.
Original NASA ASRS Text
Title: ZOB INSTRUCTOR CTLR EXPERIENCED OPERROR AT FL250 DURING BUSY TFC WHEN STUDENT ISSUED WRONG ALT AND READ BACK OF ASSIGNED ALT WAS MISSED.
Narrative: ACR X WAS MISTAKENLY ASSIGNED FL270 BY THE RADAR DEVELOPMENTAL. TFC WAS ACR Y AT FL260. TCAS RA ON BOTH ACFT AND STANDARD SEPARATION WAS LOST. THE PROB COULD HAVE BEEN PREVENTED IF I OR THE DEVELOPMENTAL CAUGHT THE READBACK; OR REALIZED THIS SITUATION WAS DEVELOPING. 14 ESTIMATED ACFT ON FREQ; NUMEROUS ACFT BEING VECTORED FOR INST APCHS AT 2 DIFFERENT ARPTS; MANY VFR ACFT. 2 FREQS BEING WORKED CAUSED MANY OVERLAPPING CALLS AND HIGH COMPLEXITY.
Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.